Loudspeaker and electronic equipment

Abstract

The utility model relates to the technical field of electronic equipment, and discloses a loudspeaker and electronic equipment, and the loudspeaker comprises a frame, a magnetic field assembly, a vibrating diaphragm and a voice coil. The magnetic field assembly is located in the basin frame, connected with the basin frame and used for providing a magnetic field, and a magnetic gap is formed in the magnetic field assembly; the vibrating diaphragm is located at the open end of the basin frame and connected with the basin frame, and a first protruding part is formed on the surface, facing the magnetic field assembly, of the vibrating diaphragm; one end of the voice coil is connected with the first protruding part, and the other end extends into the magnetic gap. The loudspeaker and the electronic equipment provided by the utility model have higher magnetic field utilization rate and sensitivity.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a speaker and an electronic device. Background Art

[0002] Nowadays, electronic devices such as mobile phones and tablets enrich people's lives, and speakers, as audio devices, play an indispensable role in electronic devices. At the same time, consumers' demand for speaker sound quality is also increasing, and correspondingly, the performance requirements for speakers are also increasing.

[0003] Most of the speakers in the related art have a low magnetic field utilization rate, which directly affects the sensitivity of the speaker, and further affects the sound quality of the speaker, resulting in a poor auditory experience for the user. Summary of the invention

[0004] In view of this, the present application provides a speaker and an electronic device with higher magnetic field utilization and sensitivity.

[0005] Specifically, this application includes the following technical solutions:

[0006] In a first aspect, the present application provides a loudspeaker, the loudspeaker comprising a basin frame, a magnetic field assembly, a diaphragm and a voice coil;

[0007] The magnetic field component is located inside the basin frame and connected to the basin frame for providing a magnetic field, wherein a magnetic gap is formed inside the magnetic field component;

[0008] The diaphragm is located at the open end of the basin frame and connected to the basin frame, and a first protrusion is formed on the surface of the diaphragm facing the magnetic field assembly;

[0009] One end of the voice coil is connected to the first protrusion, and the other end extends into the magnetic gap.

[0010] Optionally, the first protrusion is formed by a portion of the diaphragm protruding toward the magnetic field assembly.

[0011] Optionally, the voice coil comprises a frame and a coil, and the coil is wound on an outer wall of the frame;

[0012] The coil includes a first coil segment and a second coil segment connected to each other, the first coil segment is arranged closer to the first protrusion than the second coil segment, the number of coil layers of the first coil segment is less than the number of coil layers of the second coil segment, and the number of coil layers is the number of layers of the coil wound on the cross section of the voice coil.

[0013] Optionally, along the protruding direction of the first protruding portion, the first coil segment is located between the magnetic field assembly and the first protruding portion; and / or,

[0014] At least a portion of the second coil segment is located within the magnetic gap.

[0015] Optionally, the framework comprises a first portion, a connecting portion and a second portion which are connected in sequence, and a side of the first portion away from the connecting portion is connected to the first protruding portion;

[0016] The first coil segment is wound around the first portion, and the second coil segment is wound around the second portion.

[0017] Optionally, in any cross section of the skeleton, the first portion and the second portion have the same shape and equal area.

[0018] Optionally, the connection portion is a bonding structure formed after the adhesive solidifies.

[0019] Optionally, the first protrusion is annular;

[0020] A second protrusion is also formed on the surface of the diaphragm facing the magnetic field assembly, and the second protrusion is located on the inner side of the first protrusion.

[0021] Optionally, a groove is formed on the surface of the magnetic field component facing the diaphragm, wherein the orthographic projection of the second protrusion on the projection plane is located inside the orthographic projection of the groove on the projection plane, and the projection plane is perpendicular to the vibration direction of the diaphragm.

[0022] A second aspect of the present application provides an electronic device, the electronic device comprising the above-mentioned speaker.

[0023] The beneficial effects of the technical solution provided by the embodiments of the present application include at least:

[0024] In the speaker and electronic device provided in the embodiments of the present application, a first protrusion is formed on the surface of the diaphragm facing the magnetic field component, and the voice coil is connected to the first protrusion. Compared with a solution in which the voice coil is directly connected to the diaphragm, the distance between the voice coil and the magnetic field component is closer, so that one end of the voice coil can extend further into the magnetic gap, which is equivalent to increasing the volume of the voice coil in the magnetic field line dense area in the magnetic gap, thereby improving the magnetic field utilization rate of the speaker and further improving the sensitivity of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 An exploded view of a speaker provided in an embodiment of the present application is shown;

[0027] Figure 2 A cross-sectional view of a speaker provided in an embodiment of the present application is shown;

[0028] Figure 3 A magnetic field strength-amplitude (BL) curve of a speaker provided in an embodiment of the present application is shown;

[0029] Figure 4 A schematic structural diagram of a voice coil provided in an embodiment of the present application is shown. Description of the drawings:

[0031] 1. Basin stand;

[0032] 2. magnetic field assembly; 21. magnetic gap; 22. groove; 23. first magnetic part; 24. second magnetic part; 25. magnetic conductive part;

[0033] 3. diaphragm; 31. first protrusion; 32. second protrusion;

[0034] 4. Voice coil; 41. Frame; 411. First part; 412. Connecting part; 413. Second part; 42. Coil; 421. First coil segment; 422. Second coil segment;

[0035] 5. The first curve; 6. The second curve; 7. The third curve.

[0036] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. In order to make the technical solutions and advantages of the present application clearer, the speaker and electronic equipment will be described in detail below in conjunction with the drawings.

[0038] In current speakers, the voice coil is usually directly connected to the diaphragm. Due to the need to reserve a sufficiently large vibration space between the diaphragm and the magnetic field assembly, the distance between the voice coil and the magnetic field assembly is usually relatively far, resulting in low utilization of the magnetic field. The magnetic field utilization rate will affect the sensitivity of the speaker, and in turn will affect the sound quality of the speaker.

[0039] In the related art, a voice coil bracket is generally provided between the diaphragm and the voice coil to improve the magnetic field utilization of the micro speaker.

[0040] However, the additional voice coil bracket increases the number of parts, increases manufacturing costs, and complicates the assembly process. In addition, the voice coil bracket is heavy, which increases the load between the diaphragm and the voice coil, affecting the vibration of the diaphragm and possibly causing sound distortion.

[0041] In this regard, the present application provides a speaker, such as Figure 1 and Figure 2 As shown, the loudspeaker may include a basin frame 1, a magnetic field component 2, a diaphragm 3 and a voice coil 4; the magnetic field component 2 is located inside the basin frame 1 and connected to the basin frame 1 for providing a magnetic field, wherein a magnetic gap 21 is formed inside the magnetic field component 2; the diaphragm 3 is located at the open end of the basin frame 1 and connected to the basin frame 1, and a first protrusion 31 is formed on the surface of the diaphragm 3 facing the magnetic field component 2; one end of the voice coil 4 is connected to the first protrusion 31, and the other end extends into the magnetic gap 21.

[0042] In the loudspeaker provided in the embodiment of the present application, a first protrusion 31 is formed on the surface of the diaphragm 3 facing the magnetic field assembly 2, and the voice coil 4 is connected to the first protrusion 31. Compared with the solution in which the voice coil 4 is directly connected to the diaphragm 3, the distance between the voice coil 4 and the magnetic field assembly 2 is closer, so that one end of the voice coil 4 can extend further into the magnetic gap 21. Since the magnetic lines of force in the magnetic gap 21 are denser and the magnetic field intensity is higher, this is equivalent to increasing the volume of the voice coil 4 in the magnetic line-dense area in the magnetic gap 21, thereby improving the magnetic field utilization rate of the loudspeaker, and then improving the sensitivity of the loudspeaker.

[0043] Moreover, the first protrusion 31 is directly formed on the surface of the diaphragm 3 and is a part of the diaphragm 3. Compared with a speaker with an additional voice coil 4 bracket, the speaker provided in the embodiment of the present application reduces the number of parts, simplifies the assembly process, and does not increase the load between the diaphragm 3 and the voice coil 4, thereby avoiding distortion of the sound played by the speaker.

[0044] It should be noted that the magnetic field utilization is positively correlated with the sensitivity. When the magnetic field utilization increases, the sensitivity of the speaker also increases, and vice versa.

[0045] It should also be noted that the surface of the diaphragm 3 facing the magnetic field assembly 2 (excluding the first protrusion 31 and the second protrusion 32) is a flat surface. Due to the provision of the first protrusion 31, there is a certain distance between the end face of the voice coil 4 facing the diaphragm 3 and the surface of the diaphragm 3 facing the magnetic field assembly 2. By adjusting the size of the distance between the voice coil 4 and the diaphragm 3, that is, adjusting the protruding height of the first protrusion 31, the size of the volume of the voice coil 4 located in the magnetic field line dense area in the magnetic gap 21 can be adjusted, thereby adjusting the utilization of the magnetic field by the speaker, that is, adjusting the magnetic field utilization rate of the speaker.

[0046] The use of the magnetic field by the loudspeaker can be determined by Figure 3 The magnetic field strength-amplitude (BL) curve diagram shown is intuitively displayed, in which the horizontal axis of the coordinate system represents the amplitude of the diaphragm 3, and the vertical axis represents the magnetic field strength. The better the symmetry of the BL curve about the vertical axis, the higher the magnetic field utilization rate of the speaker.

[0047] Those skilled in the art can adjust the protruding height of the first protruding portion 31, that is, the spacing distance between the voice coil 4 and the surface of the diaphragm 3 facing the magnetic field assembly 2, according to actual conditions, so that the BL curve of the adjusted loudspeaker is as symmetrical as possible about the longitudinal axis. For example, Figure 3 The first curve 5 in the figure represents the BL curve of the loudspeaker in which the voice coil is directly connected to the diaphragm in the related art, and the second curve 6 and the third curve 7 represent the BL curves of the loudspeaker having the first protrusion 31, wherein the symmetry of the third curve 7 is obviously better than that of the second curve 6, and therefore the protruding height of the first protrusion 31 in the loudspeaker corresponding to the third curve 7 is more appropriate than the protruding height of the first protrusion 31 in the loudspeaker corresponding to the second curve 6, that is, the magnetic field utilization rate of the loudspeaker corresponding to the third curve 7 is higher than that of the loudspeaker corresponding to the second curve 6.

[0048] Optionally, the first protrusion 31 may be a solid protrusion (not shown in the figure) formed on the surface of the diaphragm 3 facing the magnetic field assembly 2. In this case, from the side of the diaphragm 3 facing away from the magnetic field assembly 2, the formation position of the first protrusion 31 is flush with other positions on the surface of the diaphragm 3 facing away from the magnetic field assembly 2, that is, the surface of the diaphragm 3 facing away from the magnetic field assembly 2 is flat.

[0049] Optionally, the first protrusion 31 may be a hollow structure formed by a portion of the diaphragm 3 protruding toward the magnetic field assembly 2. Generally speaking, the diaphragm is made of a film or sheet material that is light in weight and has a certain degree of rigidity. During molding, a portion of the film or sheet material is made to protrude relative to other portions to form a hollow first protrusion 31, such as Figure 2As shown. Since the first protrusion 31 is a part of the diaphragm 3, the first protrusion 31 and the diaphragm 3 are an integrally formed component, compared with the solution of additionally providing a voice coil 4 bracket, the number of parts is reduced, the production cost is reduced, and the assembly steps are simplified.

[0050] It should be noted that if Figure 2 As shown, the “hollow first protrusion 31 ” means that, viewed from the side of the diaphragm 3 facing away from the magnetic field assembly 2 , the formation position of the first protrusion 31 is recessed relative to other positions on the surface of the diaphragm 3 facing away from the magnetic field assembly 2 .

[0051] In some embodiments, the outer contour of the longitudinal section of the first protrusion 31 may be U-shaped or arc-shaped. Figure 2 As shown, the outer contour of the longitudinal section of the first protrusion 31 is U-shaped, the top surface of the first protrusion 31 is a flat plane shape, the surface of the voice coil 4 facing the diaphragm 3 is also a flat plane shape, and the surface of the voice coil 4 facing the diaphragm 3 is connected to the top surface of the first protrusion 31. Among them, the top surface of the first protrusion 31 is the surface closest to the magnetic field component 2.

[0052] Optionally, the surface of the voice coil 4 facing the diaphragm 3 is bonded to the top surface of the first protrusion 31 .

[0053] In some embodiments, the area of ​​the top surface of the first protrusion 31 is equal to the area of ​​the contact surface between the voice coil 4 and the first protrusion 31. Therefore, the first protrusion 31 is in full contact with the voice coil 4, and the entire contact surface is bonded, so that the bonding area is larger and the bonding effect is better, thereby preventing the voice coil 4 from falling off during the vibration of the diaphragm 3.

[0054] In some embodiments, the magnetic field assembly 2 includes a first magnetic portion 23, a plurality of second magnetic portions 24 and a plurality of magnetic conductive portions 25. The plurality of second magnetic portions 24 are arranged at intervals along the circumference of the magnetic field assembly 2 on the outside of the first magnetic portion 23 and are spaced apart from the first magnetic portion 23. The above-mentioned magnetic gap 21 is formed between the first magnetic portion 23 and the second magnetic portion 24. A magnetic conductive portion 25 is provided on the surface of the first magnetic portion 23 and each second magnetic portion 24 facing the diaphragm 3, which is used to form a magnetic circuit with the first magnetic portion 23 and the second magnetic portion 24 and provide a magnetic field for the voice coil 4.

[0055] Optionally, the first magnetic part 23 and the second magnetic part 24 are magnets; and / or the magnetic conductive part 25 is a washer.

[0056] In order to further improve the magnetic field utilization of the speaker, in some embodiments of the present application, such as Figure 4As shown, the voice coil 4 may include a skeleton 41 and a coil 42, and the coil 42 is wound on the outer wall of the skeleton 41; the coil 42 may include a first coil segment 421 and a second coil segment 422 connected to each other, the first coil segment 421 is arranged closer to the first protrusion 31 than the second coil segment 422, and the number of coil layers of the first coil segment 421 is less than the number of coil layers of the second coil segment 422. It should be noted that the number of coil layers is the number of layers of the coil 42 wound on the skeleton 41. It is easy to understand that the more the number of coil layers, the greater the thickness of the coil 42 on the cross section of the voice coil 4. Generally speaking, the first layer of the coil 42 is directly wound on the outer wall of the skeleton 41, the second layer of the coil 42 is wound on the first layer of the coil 42, the third layer of the coil 42 is wound on the second layer of the coil 42, and so on.

[0057] When the number of coil layers of the coil 42 located in the area where the magnetic lines of force are dense is large, it is equivalent to that more coils 42 are located in the area where the magnetic lines of force are dense, so the magnetic field utilization rate of the speaker can be improved. In the speaker provided in the embodiment of the present application, the coil 42 is wound on the frame 41. Since the side of the voice coil 4 away from the first protrusion 31 is located in the magnetic gap 21, at least a part of the second coil segment 422 is also located in the magnetic gap 21, and the number of coil layers of the second coil segment 422 is greater than the number of coil layers of the first coil segment 421, so the number of coils 42 located in the area where the magnetic lines of force are dense in the magnetic gap 21 is increased, thereby improving the magnetic field utilization rate of the speaker and improving the sensitivity of the speaker.

[0058] Optionally, along the protruding direction of the first protruding portion 31, the first coil segment 421 is located between the magnetic field assembly 2 and the first protruding portion 31; and / or, at least a portion of the second coil segment 422 is located in the magnetic gap 21. The first coil segment 421 is located outside the magnetic gap 21, and at least a portion of the second coil segment 422 is located inside the magnetic gap 21. The second coil segment 422 has a larger number of coil layers, and the number of coils 42 located in the dense magnetic field line area in the magnetic gap 21 is also greater, and the magnetic field utilization rate of the speaker is also higher.

[0059] In some embodiments, the coil 42 further includes a jumper wire, which is located between the first coil segment 421 and the second coil segment 422 and connected to the first coil segment 421 and the second coil segment 422 respectively, so as to connect the first coil segment 421 and the second coil segment 422 in series.

[0060] When connecting the jumper wire, accurate positioning is required to ensure good electrical connection. However, the number of coil layers of the first coil segment 421 is inconsistent with the number of coil layers of the second coil segment 422, and the distance between the connection position of the jumper wire at the first coil segment 421 and the second coil segment 422 and the outer wall of the frame 41 is different, which increases the complexity of connecting the jumper wire and makes it more difficult to connect the jumper wire.

[0061] Therefore, in some embodiments of the present application, Figure 4 As shown, the skeleton 41 may include a first portion 411, a connecting portion 412 and a second portion 413 connected in sequence, wherein the first portion 411 is connected to the first protrusion 31 at one side away from the connecting portion 412; the first coil segment 421 is wound around the first portion 411, and the second coil segment 422 is wound around the second portion 413.

[0062] In the speaker provided in the embodiment of the present application, the skeleton 41 is composed of a first part 411 and a second part 413 that are independently formed respectively, the first coil segment 421 is arranged on the first part 411 (the first coil segment 421 and the first part 411 as a whole can be called a small voice coil), the second coil segment 422 is arranged on the second part 413 (the second coil segment 422 and the second part as a whole can be called a large voice coil), the small voice coil and the large voice coil are connected through the connecting part 412, a first jumper is connected to the small voice coil, and a second jumper is connected to the large voice coil, the first jumper and the second jumper are welded and connected to realize series conduction of the small voice coil and the large voice coil, which reduces the difficulty of jumper connection and also reduces the precision requirements for the winding process.

[0063] In some embodiments, in any cross section of the skeleton 41 , the first portion 411 and the second portion 413 have the same shape and the same area.

[0064] The first part 411 and the second part 413 are connected by the connecting part 412. Since the cross-sectional shapes and areas of the first part 411 and the second part 413 are equal, the stress distribution at the connection is more uniform, which can reduce the risk of damage or material deformation caused by stress concentration and improve the stability and durability of the connection. In addition, the voice coil 4 will vibrate when working. If the cross-sectional shapes and areas of the first part 411 and the second part 413 do not match, vibration distortion may occur.

[0065] Optionally, the first part 411 and the second part 413 have the same structure, so that the first part 411 and the second part 413 can be manufactured using one mold or equipment, or the first part 411 and the second part 413 can be obtained through a cutting process after the skeleton matrix is ​​manufactured, without the need to use different molds or equipment to manufacture them separately, which can simplify the production process and reduce production costs and production time.

[0066] Optionally, the first part 411 and the second part 413 are connected by bonding with an adhesive, and the connecting portion 412 is a bonding structure formed after the adhesive is solidified.

[0067] In some embodiments of the present application, Figure 2 As shown, the first protrusion 31 is annular; a second protrusion 32 is also formed on the surface of the diaphragm 3 facing the magnetic field assembly 2 , and the second protrusion 32 is located on the inner side of the first protrusion 31 .

[0068] By providing the second protrusion 32 at the central position of the diaphragm 3, i.e., on the inner side of the first protrusion 31, a more uniform stress distribution can be formed between the edge and the central area of ​​the diaphragm 3, thereby effectively increasing the structural strength of the diaphragm 3; and, by adjusting the shape and size of the second protrusion 32, the vibration characteristics of the diaphragm 3, such as the vibration mode, can be changed, thereby optimizing the sound quality and performance of the speaker; in addition, when the diaphragm 3 is excited by a sound signal, the second protrusion 32 helps to guide the vibration energy generated to other parts of the diaphragm 3 except the second protrusion 32, and ensures that various parts on the diaphragm 3 vibrate with the same amplitude and direction, thereby improving the uniformity and clarity of the sound.

[0069] When the diaphragm 3 is stimulated by a sound signal, it will reciprocate (i.e., vibrate) within the amplitude range, and drive the second protrusion 32 arranged on the diaphragm 3 to move reciprocally synchronously. Since the second protrusion 32 is closer to the magnetic field assembly 2 than the surface of the diaphragm 3 facing the magnetic field assembly 2, the second protrusion 32 may collide with the magnetic field assembly 2 inside the basin frame 1 during movement, and the diaphragm 3 and the magnetic field assembly 2 may be damaged during the collision.

[0070] In some embodiments of the present application, Figure 2 As shown, a groove 22 may be provided on the surface of the magnetic field component 2 facing the diaphragm 3 , wherein the orthographic projection of the second protrusion 32 on the projection plane is located inside the orthographic projection of the groove 22 on the projection plane, and the projection plane is perpendicular to the vibration direction of the diaphragm 3 .

[0071] It should be noted that the orthographic projection of the second protrusion 32 on the projection plane is located inside the orthographic projection of the groove 22 on the projection plane, which includes the situation that the area of ​​the orthographic projection of the second protrusion 32 on the projection plane is smaller and thus completely located within the orthographic projection of the groove 22 on the projection plane, and also includes the situation that the orthographic projection of the second protrusion 32 on the projection plane coincides with the orthographic projection of the groove 22 on the projection plane.

[0072] Since the groove 22 is located in the vibration direction of the second protrusion 32, and the orthographic projection of the second protrusion 32 on the projection plane is located inside the orthographic projection of the groove 22 on the projection plane, the groove 22 actually plays a role in making the magnetic field component 2 avoid the movable second protrusion 32, that is, a safety gap is formed between the second protrusion 32 and the magnetic field component 2, which can prevent the second protrusion 32 from colliding with the magnetic field component 2 when moving to the maximum displacement, thereby avoiding damage to the diaphragm 3 and the magnetic field component 2, and improving the service life of the speaker.

[0073] The present application also provides an electronic device, which includes the above-mentioned speaker.

[0074] In the electronic device provided in the embodiment of the present application, a first protrusion 31 is formed on the surface of the diaphragm 3 facing the magnetic field assembly 2, and the voice coil 4 is connected to the first protrusion 31. Compared with the solution in which the voice coil 4 is directly connected to the diaphragm 3, the distance between the voice coil 4 and the magnetic field assembly is closer, so that one end of the voice coil 4 can extend more into the magnetic gap 21, which is equivalent to increasing the volume of the voice coil 4 in the magnetic field line dense area in the magnetic gap 21, thereby improving the magnetic field utilization rate of the speaker, and then improving the sensitivity of the speaker. In addition, the first protrusion 31 is a part of the diaphragm 3. Compared with the speaker with an additional voice coil 4 bracket, the number of parts is reduced, the assembly process is simplified, the load between the diaphragm 3 and the voice coil 4 will not be increased, and the sound distortion of the speaker is avoided.

[0075] Furthermore, since the electronic device adopts the above-mentioned loudspeaker, the sound quality when playing audio or video is better, which can give the user a better auditory experience.

[0076] Optionally, the electronic device in the embodiment of the present application may be any device with a sound playing function, such as a speaker, a mobile phone, a tablet computer, a laptop computer, a wearable device, etc.

[0077] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0078] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.

[0079] It should be understood that the present application is not limited to the exact construction that has been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof.

Claims

1. A loudspeaker, characterized in that: The loudspeaker comprises a basin frame (1), a magnetic field component (2), a diaphragm (3) and a voice coil (4); The magnetic field component (2) is located inside the basin frame and connected to the basin frame (1) and is used to provide a magnetic field, wherein a magnetic gap (21) is formed inside the magnetic field component (2); The diaphragm (3) is located at the open end of the basin frame (1) and is connected to the basin frame (1); a first protrusion (31) is formed on the surface of the diaphragm (3) facing the magnetic field assembly (2); One end of the voice coil (4) is connected to the first protruding portion (31), and the other end extends into the magnetic gap (21).

2. The loudspeaker according to claim 1, characterized in that The first protrusion (31) is formed by a portion of the diaphragm (3) protruding toward the magnetic field assembly (2).

3. The loudspeaker according to claim 1, characterized in that The voice coil (4) comprises a frame (41) and a coil (42), wherein the coil (42) is wound on the outer wall of the frame (41); The coil (42) comprises a first coil segment (421) and a second coil segment (422) which are connected to each other; the first coil segment (421) is arranged closer to the first protrusion (31) than the second coil segment (422); the number of coil layers of the first coil segment (421) is smaller than the number of coil layers of the second coil segment (422); the number of coil layers is the number of layers of the coil (42) wound on the frame (41).

4. The loudspeaker according to claim 3, characterized in that Along the protruding direction of the first protruding portion (31), the first coil segment (421) is located between the magnetic field component (2) and the first protruding portion (31); and / or, At least a portion of the second coil segment (422) is located within the magnetic gap (21).

5. The loudspeaker according to claim 3 or 4, characterized in that: The frame (41) comprises a first portion (411), a connecting portion (412) and a second portion (413) which are connected in sequence, and a side of the first portion (411) away from the connecting portion (412) is connected to the first protruding portion (31); The first coil segment (421) is wound around the first portion (411), and the second coil segment (422) is wound around the second portion (413).

6. The loudspeaker according to claim 5, characterized in that In any cross section of the skeleton (41), the first portion (411) and the second portion (413) have the same shape and the same area.

7. The loudspeaker according to claim 5, characterized in that The connection portion (412) is a bonding structure formed after the adhesive solidifies.

8. The loudspeaker according to claim 1, characterized in that The first protrusion (31) is annular; A second protrusion (32) is also formed on the surface of the diaphragm (3) facing the magnetic field assembly (2), and the second protrusion (32) is located on the inner side of the first protrusion (31).

9. The loudspeaker according to claim 8, characterized in that A groove (22) is provided on the surface of the magnetic field component (2) facing the diaphragm (3), wherein the orthographic projection of the second protrusion (32) on the projection plane is located inside the orthographic projection of the groove (22) on the projection plane, and the projection plane is perpendicular to the vibration direction of the diaphragm (3).

10. An electronic device, characterized in that: The electronic device comprises the speaker according to any one of claims 1 to 9.

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